Everything tight? Water march!
For the first leak test in the bath, I still operated both parts of the loop separately, so accordingly formed two circuits with the new quick couplings. The external loop, i.e. the SuperNova with one meter of hose on each side, had two problems during the first tests: firstly, one of the inlets on the radiator could not be sealed and secondly, a 90° screw-on nozzle on the pump was leaking. I was lucky with the spout, as I just had another one as a spare – otherwise I would have had to use a straight spout, which I’m sure wouldn’t have been a problem at this point.
The leaking thread on the radiator gave me a bit more of a headache: where exactly is the leak? Here, too, I screwed in a 90° grommet, which has an integrated rubber seal on the thread, but which protrudes so little that I wondered beforehand whether this would not result in too little pressure on the rubber ring. When some moisture then escaped at this connection, it was clear to me that the rubber ring is probably not quite enough here. The thread on the radiator was so partly painted, partly the paint was off again. Possibly there is just a tad too much paint on it, so that the thread then could not be turned in so far that the rubber seal under pressure closes completely.
Well, what to do? Send the radi back and probably lose a week? I then remembered that I had connected a water boiler in Mexico about half a year ago in a similar way and used such a sealing tape for threads – and what luck, I have here the former toolbox of the now in Mexico resident relatives together with two rolls of thread sealing tape! On the third attempt with about five windings, this connection on the radiator was then also tight for over an hour – and I can reveal, it still is.
The internal loop, still consisting of Eiswolf, Eisbär and the two associated Radis was tight from the start and in the dismantled state, the air from all four components is also quite easy to get out: shake a little, turn a little and it’s good.
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